When they cannot see the sun, they use some special way to sense direction from the earth's magnetic field.

看不见太阳时，它们会依据地球的磁场采用某种特殊的方法来感知方向。

youdao

When they cannot see the sun, they use some special way to sense direction from the earth's magnetic field.

看不见太阳时，它们会依据地球的磁场采用某种特殊的方法来感知方向。

youdao